suchen

Heim  >  Fragen und Antworten  >  Hauptteil

java - 为什么无法在构造方法是使用泛型?

/**

public class GenericDemo02 {
    public static void main(String[] args) {

         Con<String> c= new Con<String>("Archer");

        System.out.println(c.getValue());
        System.out.println("hello");
    }
}


class Con<T>{
    private T value;

    public Con(T value) {
        this.value = value;
    }

    public T getValue() {
        return value;
    }

    public void setValue(T value) {
        this.value = value;
    }


}

编译器报错,jdk1.8

Exception in thread "main" java.lang.NoClassDefFoundError: Con
    at GenericDemo02.main(GenericDemo02.java:7)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Caused by: java.lang.ClassNotFoundException: Con
    at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 6 more
巴扎黑巴扎黑2887 Tage vor520

Antworte allen(2)Ich werde antworten

  • PHP中文网

    PHP中文网2017-04-17 17:35:31

    你Con这个类就是上面这样写的?那错误有二:
    1.Con前面没有Class
    2.Con后面没有<T>

    Antwort
    0
  • PHP中文网

    PHP中文网2017-04-17 17:35:31

    应该是Con{...}

    Antwort
    0
  • StornierenAntwort